Is Meal Timing good for metabolic health?

The evidence points that way, though it's not yet conclusive. A systematic review and meta-analysis in JAMA Network Open found meal timing is associated with anthropometric and metabolic outcomes independent of total caloric intake, and several randomized controlled trials support this directly: early time-restricted feeding improved 24-hour glucose levels and affected circadian and aging-related biomarkers in one trial, while a separate trial found prolonged, controlled daytime eating (versus delayed, evening-shifted eating) improved weight and metabolic markers even when calorie content was matched between groups. That's reflected in an evidence score of 50/100 for its role in metabolic health, drawn from 5 studies (3 RCTs), with an estimated impact on longevity rated moderate (38/100).